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| 1 | +/* | |
| 2 | + * Copyright (c) 2003, 2004, Oracle and/or its affiliates. All rights reserved. | |
| 3 | + * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. | |
| 4 | + * | |
| 5 | + * This code is free software; you can redistribute it and/or modify it | |
| 6 | + * under the terms of the GNU General Public License version 2 only, as | |
| 7 | + * published by the Free Software Foundation. Oracle designates this | |
| 8 | + * particular file as subject to the "Classpath" exception as provided | |
| 9 | + * by Oracle in the LICENSE file that accompanied this code. | |
| 10 | + * | |
| 11 | + * This code is distributed in the hope that it will be useful, but WITHOUT | |
| 12 | + * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
| 13 | + * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | |
| 14 | + * version 2 for more details (a copy is included in the LICENSE file that | |
| 15 | + * accompanied this code). | |
| 16 | + * | |
| 17 | + * You should have received a copy of the GNU General Public License version | |
| 18 | + * 2 along with this work; if not, write to the Free Software Foundation, | |
| 19 | + * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. | |
| 20 | + * | |
| 21 | + * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA | |
| 22 | + * or visit www.oracle.com if you need additional information or have any | |
| 23 | + * questions. | |
| 24 | + */ | |
| 25 | + | |
| 26 | +package sun.reflect; | |
| 27 | + | |
| 28 | +import java.lang.reflect.*; | |
| 29 | + | |
| 30 | +/** Provides reflective access to the constant pools of classes. | |
| 31 | + Currently this is needed to provide reflective access to annotations | |
| 32 | + but may be used by other internal subsystems in the future. */ | |
| 33 | + | |
| 34 | +public class ConstantPool { | |
| 35 | + // Number of entries in this constant pool (= maximum valid constant pool index) | |
| 36 | + public int getSize() { return getSize0 (constantPoolOop); } | |
| 37 | + public Class getClassAt (int index) { return getClassAt0 (constantPoolOop, index); } | |
| 38 | + public Class getClassAtIfLoaded (int index) { return getClassAtIfLoaded0 (constantPoolOop, index); } | |
| 39 | + // Returns either a Method or Constructor. | |
| 40 | + // Static initializers are returned as Method objects. | |
| 41 | + public Member getMethodAt (int index) { return getMethodAt0 (constantPoolOop, index); } | |
| 42 | + public Member getMethodAtIfLoaded(int index) { return getMethodAtIfLoaded0(constantPoolOop, index); } | |
| 43 | + public Field getFieldAt (int index) { return getFieldAt0 (constantPoolOop, index); } | |
| 44 | + public Field getFieldAtIfLoaded (int index) { return getFieldAtIfLoaded0 (constantPoolOop, index); } | |
| 45 | + // Fetches the class name, member (field, method or interface | |
| 46 | + // method) name, and type descriptor as an array of three Strings | |
| 47 | + public String[] getMemberRefInfoAt (int index) { return getMemberRefInfoAt0 (constantPoolOop, index); } | |
| 48 | + public int getIntAt (int index) { return getIntAt0 (constantPoolOop, index); } | |
| 49 | + public long getLongAt (int index) { return getLongAt0 (constantPoolOop, index); } | |
| 50 | + public float getFloatAt (int index) { return getFloatAt0 (constantPoolOop, index); } | |
| 51 | + public double getDoubleAt (int index) { return getDoubleAt0 (constantPoolOop, index); } | |
| 52 | + public String getStringAt (int index) { return getStringAt0 (constantPoolOop, index); } | |
| 53 | + public String getUTF8At (int index) { return getUTF8At0 (constantPoolOop, index); } | |
| 54 | + | |
| 55 | + //--------------------------------------------------------------------------- | |
| 56 | + // Internals only below this point | |
| 57 | + // | |
| 58 | + | |
| 59 | + static { | |
| 60 | + Reflection.registerFieldsToFilter(ConstantPool.class, new String[] { "constantPoolOop" }); | |
| 61 | + } | |
| 62 | + | |
| 63 | + // HotSpot-internal constant pool object (set by the VM, name known to the VM) | |
| 64 | + private Object constantPoolOop; | |
| 65 | + | |
| 66 | + private native int getSize0 (Object constantPoolOop); | |
| 67 | + private native Class getClassAt0 (Object constantPoolOop, int index); | |
| 68 | + private native Class getClassAtIfLoaded0 (Object constantPoolOop, int index); | |
| 69 | + private native Member getMethodAt0 (Object constantPoolOop, int index); | |
| 70 | + private native Member getMethodAtIfLoaded0(Object constantPoolOop, int index); | |
| 71 | + private native Field getFieldAt0 (Object constantPoolOop, int index); | |
| 72 | + private native Field getFieldAtIfLoaded0 (Object constantPoolOop, int index); | |
| 73 | + private native String[] getMemberRefInfoAt0 (Object constantPoolOop, int index); | |
| 74 | + private native int getIntAt0 (Object constantPoolOop, int index); | |
| 75 | + private native long getLongAt0 (Object constantPoolOop, int index); | |
| 76 | + private native float getFloatAt0 (Object constantPoolOop, int index); | |
| 77 | + private native double getDoubleAt0 (Object constantPoolOop, int index); | |
| 78 | + private native String getStringAt0 (Object constantPoolOop, int index); | |
| 79 | + private native String getUTF8At0 (Object constantPoolOop, int index); | |
| 80 | +} | |